你可以用 "You are truly kind." 来表示 "你真的善良"。这是一句英文的固定用法，表示对某人善良的真挚赞扬。

举个例子：

Example 1:

A: "I can't bepeve you donated all of your savings to the charity."
B: "Yeah, I just wanted to help out however I could."
A: "Well, you are truly kind. Thank you for your generosity."

Example 2:

A: "I'm so touched by your act of kindness towards the homeless man on the street."
B: "It was the least I could do. I just hope it made a difference in his pfe."
A: "It definitely did. You are truly kind."

在这两个例子中，A 用 "You are truly kind." 来表示对 B 的赞扬，感谢 B 的善良。